Open URLs in Iframe Question

Open URLs in Iframe Question

I currently embed my form into an iframe on my website using a widget in IWeb.  It works surprisingly well and is very simple.
When the form is submitted,  a new web page (thanking the client for filling out the form) is opened in the Iframe.
I use the embed editor on the form application to create the html code to embed in the iframe.

The one problem I have is that the 'thank you' web page is significantly smaller (shorter) than the iframe,  and most of it is out of view unless you scroll back up the page.

I've been unsuccessful in trying 2 solutions:
1-  I simply tried to open a new URL in the parent window....  doesn't work for some reason.
2-  I tried resizing the iframe before the open URL command.....  didn't work either-  probably a scripting error.

Does anyone have an idea about how to solve either of the solutions above-  or have another one that would work-  making the final page look a little better without excessive scrolling?

Thanks for your input.
The webpage can be seen at:   www.DWMUpdate.com    and it isn't live yet- so feel free to fill out the form to see what the outcome looks like on your browser.


-Steve